Mark Levin was born in Philadelphia in 1957. In just a few short years, he has become one of the hottest hosts in talk radio. He is also one of the top new authors in the conservative political arena. Mark has been a frequent guest and substitute host on The Sean Hannity Show, and has also been an advisor to Rush Limbaugh, who frequently refers to him on the air with the nickname "F. Lee Levin." He is perhaps more well-known for his nickname, "The Great One," coined by his friend Sean Hannity. Mark Levin is one of America's preeminent conservative commentators and constitutional lawyers. He's in great demand as a political and legal commentator, and has appeared on hundreds of television and radio programs. Levin is also a contributing editor for National Review Online, and writes frequently for other publications. Levin has served as a top advisor to several members of President Ronald Reagan's Cabinet - including as Chief of Staff to the Attorney General of the United States. In 2001, the American Conservative Union named Levin the recipient of the prestigious Ronald Reagan Award. He currently practices law in the private sector, heading up the prestigious Landmark Legal Foundation in Washington, DC.